USAP Siple Dome (SDM) site lat/lon = (-81.6640,-149.0175) cell lat/lon = (-81.6600,-148.9887) Forecast initialized at 2026-05-03/00 UTC MPAS cell scale: 2.3 km FCST UTC UTC T Td Altim Spd Gust Dir Grid VVV RH1RH2RH3 T1T2T3 ACCUM HR DAY HR (C) (C) (in Hg)(kts)(kts)(deg)(deg) (*) (% wrt water) (C) (*) 0 03 00 -19.3 -24.3 28.65 9 13 67 278 -003 66 58 34 -15-14-13 000 1 03 01 -22.0 -24.4 28.66 11 16 79 290 000 97 41 34 -14-12-13 000 2 03 02 -21.9 -23.5 28.67 11 20 71 282 -010 106 41 41 -13-13-13 000 3 03 03 -21.9 -23.5 28.68 12 20 70 281 -009 107 40 53 -13-13-13 000 4 03 04 -21.4 -23.5 28.67 12 18 78 289 -004 100 37 67 -11-12-13 000 5 03 05 -20.9 -23.8 28.68 11 16 78 289 000 90 38 69 -11-11-12 000 6 03 06 -20.6 -24.4 28.69 10 13 77 288 -001 78 42 60 -10-11-12 000 7 03 07 -20.5 -24.8 28.66 10 12 83 294 -001 72 47 48 -10-11-12 000 8 03 08 -20.1 -25.0 28.63 9 11 94 305 000 67 41 45 -10-10-11 000 9 03 09 -19.8 -25.2 28.61 10 13 108 319 -001 62 31 45 -10-10-11 000 10 03 10 -19.7 -25.0 28.62 10 14 108 319 -004 63 29 43 -9-10-10 000 11 03 11 -19.6 -24.7 28.60 8 12 107 318 -004 67 27 40 -9 -9-10 000 12 03 12 -18.6 -23.9 28.57 5 10 114 325 004 69 32 38 -11-11-11 000 13 03 13 -21.1 -24.8 28.58 7 7 243 94 000 82 41 47 -12-12-12 000 14 03 14 -21.0 -24.0 28.57 6 10 245 96 -002 89 42 42 -13-13-13 000 15 03 15 -19.5 -23.2 28.57 2 8 204 55 -003 85 42 45 -13-13-13 000 16 03 16 -19.2 -23.2 28.57 3 6 268 119 -004 83 43 46 -14-13-13 000 17 03 17 -19.2 -22.1 28.57 7 10 271 122 -004 90 41 48 -13-13-13 000 18 03 18 -18.6 -20.2 28.57 7 12 281 132 000 105 40 50 -13-12-13 000 19 03 19 -18.9 -21.0 28.60 11 17 321 172 001 99 43 44 -14-13-13 000 20 03 20 -18.5 -21.9 28.63 10 21 329 180 008 85 41 53 -13-13-14 000 21 03 21 -19.3 -22.0 28.68 15 25 330 181 -003 94 40 77 -13-13-13 000 22 03 22 -20.5 -22.8 28.72 14 26 339 190 -001 99 54 79 -13-13-14 000 23 03 23 -21.0 -22.4 28.76 14 24 345 196 -001 110 64 84 -14-14-15 000 24 04 00 -20.9 -21.5 28.80 11 20 345 196 000 121 77 82 -15-14-15 000 25 04 01 -21.2 -21.7 28.84 9 15 5 216 000 122 72 86 -15-15-15 000 26 04 02 -22.0 -22.5 28.87 10 14 21 232 000 123 68 90 -15-15-15 000 27 04 03 -22.0 -22.5 28.90 8 11 16 227 -001 123 69 94 -15-15-15 000 28 04 04 -23.3 -24.0 28.93 7 8 27 238 -002 124 69 95 -14-14-15 000 29 04 05 -23.0 -23.7 28.95 6 6 33 244 -002 123 71 97 -14-14-15 000 30 04 06 -19.9 -19.9 28.97 4 5 50 261 -004 120 71102 -14-14-15 000 31 04 07 -21.1 -21.5 28.98 6 10 104 315 002 121 80110 -14-15-16 000 32 04 08 -20.3 -21.0 29.00 9 17 139 350 000 116 86111 -16-16-16 000 33 04 09 -21.9 -22.5 29.00 9 18 151 2 001 122 91117 -16-15-16 000 34 04 10 -23.0 -23.5 29.01 9 20 149 0 000 124 96117 -16-15-15 000 35 04 11 -21.0 -21.5 29.02 10 20 154 5 -001 122 69110 -17-15-16 000 36 04 12 -20.6 -21.0 29.02 9 16 162 13 000 121 74100 -16-15-16 000 37 04 13 -23.0 -23.6 29.02 6 14 163 14 001 124 93119 -15-15-16 000 38 04 14 -23.4 -24.1 29.02 6 13 158 9 -002 124 99120 -15-15-16 000 39 04 15 -21.5 -22.5 29.02 5 10 140 351 -001 118103121 -15-15-16 000 40 04 16 -21.9 -22.0 29.01 4 6 86 297 000 122107 98 -15-15-16 000 41 04 17 -21.9 -21.9 28.99 5 6 43 254 000 122 99 86 -15-15-16 000 42 04 18 -25.0 -25.6 28.99 9 11 40 251 003 125 81 96 -14-15-16 000 43 04 19 -24.2 -24.7 28.98 9 12 40 251 -003 123 83 90 -15-15-16 000 44 04 20 -24.5 -25.0 28.97 9 10 45 256 004 124 84 60 -14-15-16 000 45 04 21 -23.9 -24.1 28.95 8 9 48 259 001 123 35 38 -14-15-16 000 46 04 22 -23.0 -23.9 28.95 7 9 58 269 002 112 33 33 -14-15-16 000 47 04 23 -22.3 -24.6 28.95 7 9 68 279 003 96 35 29 -14-15-16 000 48 05 00 -22.0 -25.0 28.93 6 9 83 294 002 89 37 31 -14-15-16 000 49 05 01 -22.3 -26.5 28.90 6 11 110 321 000 77 40 32 -15-16-16 000 50 05 02 -23.6 -27.1 28.88 7 13 134 345 001 84 24 32 -15-14-15 000 51 05 03 -24.5 -26.5 28.86 8 15 140 351 001 102 26 24 -15-14-14 000 52 05 04 -23.7 -26.9 28.84 8 14 145 356 000 86 34 22 -14-14-14 000 53 05 05 -23.4 -27.9 28.82 8 14 146 357 002 74 33 35 -14-13-13 000 54 05 06 -23.1 -28.1 28.80 7 13 144 355 001 70 31 49 -13-12-13 000 55 05 07 -22.5 -28.0 28.77 6 11 142 353 000 67 38 62 -12-12-12 000 56 05 08 -20.7 -27.0 28.76 5 10 131 342 000 63 68 65 -11-12-12 000 57 05 09 -21.2 -26.0 28.74 7 10 113 324 001 72 74 61 -12-12-12 000 58 05 10 -21.4 -22.7 28.73 7 10 99 310 000 106 66 55 -11-12-12 000 59 05 11 -21.2 -21.3 28.71 8 10 93 304 000 119 59 48 -11-11-11 000 60 05 12 -21.0 -21.4 28.70 9 11 80 291 000 116 51 46 -10-10-10 000 61 05 13 -20.6 -21.9 28.68 9 13 70 281 -003 105 42 61 -9 -9 -9 000 62 05 14 -19.4 -21.5 28.67 12 18 70 281 -001 98 47 53 -8 -8 -9 000 63 05 15 -19.8 -21.4 28.65 12 20 76 287 -002 105 46 54 -10 -9 -9 000 64 05 16 -20.5 -20.9 28.63 12 24 75 286 -003 121 35 53 -9 -9 -9 000 65 05 17 -19.3 -19.9 28.62 13 24 67 278 000 116 37 53 -10-10 -9 000 66 05 18 -18.9 -19.5 28.60 14 23 67 278 -006 116 36 62 -11-10 -9 000 67 05 19 -18.6 -19.5 28.58 14 23 69 280 -004 114 38 62 -11-10-10 000 68 05 20 -20.1 -20.5 28.57 13 22 63 274 -011 120 40 61 -12-11-10 000 69 05 21 -20.8 -21.3 28.57 12 21 58 269 -011 121 38 63 -12-11-10 000 70 05 22 -21.5 -21.9 28.57 13 21 60 271 -010 122 39 57 -11-10-10 000 71 05 23 -21.9 -22.3 28.56 12 20 61 272 000 122 40 45 -10 -9-10 000 72 06 00 -21.5 -22.4 28.56 12 20 40 251 003 115 37 31 -9 -9 -9 000 73 06 01 -20.7 -22.4 28.56 12 19 35 246 000 105 37 28 -9 -9 -9 000 74 06 02 -23.5 -23.9 28.57 5 14 96 307 -013 124 39 38 -10 -9 -9 000 75 06 03 -24.2 -24.7 28.56 7 16 88 299 -012 124 42 44 -10 -9 -9 000 76 06 04 -21.2 -23.7 28.55 8 15 58 269 -004 92 39 41 -9 -8 -8 000 77 06 05 -20.2 -23.8 28.54 10 15 49 260 -011 80 39 40 -9 -8 -8 000 78 06 06 -19.7 -23.3 28.54 11 15 53 264 -019 81 32 42 -9 -8 -8 000 79 06 07 -20.0 -22.5 28.53 12 17 60 271 -011 95 32 47 -9 -7 -8 000 80 06 08 -19.5 -22.7 28.53 11 16 59 270 -006 86 32 50 -8 -8 -8 000 81 06 09 -18.6 -23.1 28.52 9 11 50 261 -005 70 32 47 -8 -7 -8 000 82 06 10 -18.8 -23.2 28.51 10 11 61 272 -008 71 33 48 -8 -8 -8 000 83 06 11 -19.5 -23.2 28.51 10 12 69 280 001 79 32 47 -7 -7 -8 000 84 06 12 -18.9 -23.3 28.49 10 12 75 286 005 70 33 43 -8 -8 -9 000 85 06 13 -17.8 -23.1 28.47 8 9 64 275 000 64 32 38 -7 -7 -8 000 86 06 14 -19.6 -24.0 28.45 10 12 68 279 001 71 32 29 -7 -8 -8 000 87 06 15 -19.6 -24.5 28.44 10 13 73 284 001 66 35 32 -8 -9 -9 000 88 06 16 -19.8 -24.9 28.43 9 12 72 283 000 66 38 35 -9 -9 -9 000 89 06 17 -20.3 -25.0 28.41 9 12 74 285 -003 69 35 41 -9 -9 -9 000 90 06 18 -20.6 -24.7 28.39 10 15 75 286 -002 75 35 47 -10 -9 -9 000 91 06 19 -21.0 -24.9 28.37 10 14 74 285 000 77 36 48 -10-10 -9 000 92 06 20 -21.1 -24.7 28.35 11 18 73 284 003 83 36 43 -10-10 -9 000 93 06 21 -21.9 -24.8 28.34 11 20 72 283 003 91 36 44 -10-10-10 000 94 06 22 -22.2 -25.2 28.32 11 22 68 279 001 91 34 45 -10 -9-10 000 95 06 23 -23.0 -25.5 28.31 11 23 69 280 000 99 33 51 -9 -9-10 000 96 07 00 -21.9 -25.1 28.30 13 24 76 287 -004 90 37 57 -9 -9-10 000 97 07 01 -21.9 -24.9 28.29 13 23 69 280 001 92 33 61 -10 -9-10 000 98 07 02 -22.2 -24.9 28.28 13 22 70 281 -005 95 42 53 -11 -9-10 000 99 07 03 -22.6 -25.3 28.27 12 21 65 276 -001 96 39 43 -11-10-11 000 100 07 04 -22.6 -25.1 28.26 12 21 64 275 000 98 33 42 -11-10-10 000 101 07 05 -22.7 -24.6 28.25 12 21 56 267 -002 106 38 41 -12-10-10 000 102 07 06 -22.8 -24.4 28.25 12 19 57 268 -001 108 37 45 -12-10-10 000 103 07 07 -23.1 -24.6 28.25 11 19 68 279 -007 110 40 47 -11-11-11 000 104 07 08 -23.3 -25.6 28.25 11 17 64 275 -003 99 39 47 -12-11-11 000 105 07 09 -23.9 -25.3 28.24 12 19 56 267 000 113 39 49 -12-11-11 000 106 07 10 -25.6 -26.1 28.25 12 20 47 258 -003 127 37 46 -14-11-11 000 107 07 11 -26.8 -27.4 28.25 11 18 43 254 -014 129 41 43 -14-13-12 000 108 07 12 -27.8 -28.3 28.26 12 19 48 259 -009 130 42 45 -16-13-12 000 109 07 13 -28.6 -29.1 28.27 13 20 44 255 -007 131 42 44 -16-13-13 000 110 07 14 -29.4 -29.9 28.27 12 19 41 252 -005 132 41 44 -16-13-13 000 111 07 15 -29.3 -29.9 28.28 12 18 44 255 -002 132 45 44 -17-14-13 000 112 07 16 -30.8 -31.4 28.28 11 16 36 247 002 134 48 45 -17-14-14 000 113 07 17 -32.7 -33.6 28.30 10 14 27 238 003 132 58 51 -18-15-15 000 114 07 18 -33.9 -35.3 28.32 12 16 23 234 003 125 63 60 -21-16-16 000 115 07 19 -34.8 -36.6 28.33 12 17 22 233 -001 121 77 61 -23-17-17 000 116 07 20 -36.0 -38.3 28.35 13 18 13 224 -002 115 92 59 -24-18-17 000 117 07 21 -36.5 -38.4 28.38 13 21 9 220 -001 121112 57 -27-20-18 000 118 07 22 -36.5 -38.4 28.41 13 22 9 220 -003 121120 58 -28-21-18 000 119 07 23 -35.0 -37.5 28.43 13 24 5 216 -001 110117 76 -28-22-19 000 120 08 00 -33.7 -36.2 28.46 13 26 359 210 000 110127 78 -27-24-19 001 * NOTES on units: VVV (vertical velocity) is given as tenths of a microbar per second at 700 hPa, with positive values indicating upward motion; ACCUM (accumulated precipitation, past 3h) is given as hundredths of a millimeter; RH1, RH2, and RH3 are the % RH at the surface, 1000', and 3000', respectively; T1, T2, and T3 are the temperatures at 500', 1000', and 1500', respectively. Gust is estimated according to the NCEP HRRR gust algorithm.